Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
1300300severely pollutedlightly polluted921excellent
1200300severely pollutedlightly polluted871excellent
1100300severely pollutedlightly polluted911excellent
1000300severely pollutedlightly polluted661excellent
0900250severely pollutedgood441excellent
0800235severely pollutedgood471excellent
0700248severely pollutedgood531excellent
0600279severely pollutedgood571excellent
0500257severely pollutedgood561excellent
0400250severely pollutedgood441excellent
0300272severely pollutedgood431excellent
0200299severely pollutedgood531excellent
0100300severely pollutedgood511excellent
0000300severely pollutedgood541excellent
2300300severely pollutedgood601excellent
2200300severely pollutedgood561excellent
2100300severely pollutedgood581excellent
2000300severely pollutedgood561excellent
1900300severely pollutedgood551excellent
1800296severely pollutedgood521excellent
1700296severely pollutedgood521excellent
1600297severely pollutedgood531excellent
1500252severely pollutedgood451excellent
1400244severely pollutedgood491excellent